CN218542392U

CN218542392U - Engine adopting targeted beam scavenging combustion technology

Info

Publication number: CN218542392U
Application number: CN202222720266.6U
Authority: CN
Inventors: 陈煜林; 孙公明; 付守忠
Original assignee: Shandong Surui Power Technology Co ltd
Current assignee: Shandong Surui Power Technology Co ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-02-28
Anticipated expiration: 2032-10-17

Abstract

The utility model discloses a target beam scavenging combustion technology engine relates to internal-combustion engine technical field. The device comprises a crankcase, a crankshaft connecting rod group, a cylinder body, a piston and a target beam flow pad, wherein the cylinder body is provided with an air inlet, a scavenging port and main and auxiliary scavenging passages; the target beam cushion is provided with beam holes with two different structures, the corresponding position of the main scavenging passage is provided with a circular target beam hole with the diameter of 5mm, and the corresponding position of the auxiliary scavenging passage is provided with a special-shaped target beam hole. Compared with the prior art, the utility model have the advantage that improves scavenging efficiency greatly, reduces compound emission such as HC and CO in the tail gas.

Description

Engine adopting targeted beam scavenging combustion technology

Technical Field

The utility model relates to an internal-combustion engine technical field especially relates to a target line engine.

Background

At present, two structures are generally adopted for a low-emission two-stroke gasoline engine, one structure is that a silencer is additionally provided with a catalytic conversion device on the basis of an original engine to reduce the emission of harmful gases such as HC and CO, and the content of noble metals of a catalyst is generally more than 50 g. In addition, a layered scavenging technology is adopted, a part of air is stored in a scavenging passage in advance, and scavenging is carried out first, so that the phenomenon that mixed gas is directly discharged along with waste gas without combustion is reduced, harmful ingredients in tail gas are effectively reduced, and the environment is protected. Practice proves that the catalyst is directly added in the silencer to reduce the discharge of harmful gas, the temperature of the engine is easily overhigh, and the service life of the engine is reduced. The use of a layered scavenging technology faces two problems at present, the first current technology is protected by foreign patents and can not be completely used, and the silencer has great influence on reducing the discharge of harmful gases such as HC and CO, and needs to be added with a small amount of catalyst if the discharge requirements of China and abroad are met. The second layered scavenging technology has high processing and manufacturing cost and is not beneficial to large-scale popularization. Therefore, a two-stroke gasoline engine which can effectively reduce the discharge of harmful gases, does not increase the cost and does not influence the service life of the engine is urgently needed, and not only can the environment be effectively protected, but also economic benefits can be brought to the society.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a target beam scavenging combustion technology engine, when the piston does work downwards, the mixed oil gas stored in the crankcase chamber is increased by the compression pressure, and the mixed oil gas accurately and accurately flows into the main and auxiliary scavenging passages at high speed through the target beam flow hole between the box body and the cylinder body; the main and auxiliary scavenging passages have different structures, paths and scavenging effects; the gas generates high-speed fluidity in the scavenging passage through the targeting beam-forming holes with different structures, and generates vortex during scavenging, thereby greatly improving the scavenging efficiency and reducing the emission of compounds such as HC, CO and the like in the tail gas.

In order to solve the technical problem, the utility model relates to a target beam scavenging combustion technology engine, which comprises a crankcase, a crankshaft connecting rod group, a cylinder body, a piston and a target beam cushion, wherein the cylinder body is provided with an air inlet, a scavenging port and a main scavenging passage and an auxiliary scavenging passage; the target beam current cushion is provided with two different structure beam current holes, the corresponding position of the main scavenging passage is provided with a circular target beam current hole with the diameter of 5mm, and the corresponding position of the auxiliary scavenging passage is provided with a special-shaped target beam current hole.

Preferably, the cross-sectional area a of the circular beam current hole, the cross-sectional area b of the special-shaped beam current hole, a: b =1:1.2, the irregular beam current holes are irregularly changed according to the structure of the auxiliary scavenging passage.

The utility model discloses target beam scavenging combustion technique engine compares with prior art has following technological effect: the main scavenging passage beam flow hole starts scavenging with the auxiliary scavenging passage by means of high-speed airflow with a circular structure, and then mixed oil gas enters the scavenging passage through the special-shaped beam flow hole to continue scavenging; the gas generates different fluidity in the cylinder body scavenging passage through the main flow-restraining hole and the special-shaped flow-restraining hole, and when the gas flows into the combustion chamber, vortex is generated, so that the scavenging efficiency is greatly improved, and the emission of compounds such as HC, CO and the like in tail gas is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the engine adopting the targeted beam scavenging combustion technology of the invention;

FIG. 2 is a schematic illustration of the operation of the engine shown in FIG. 1;

FIG. 3 is a schematic block diagram of the engine of FIG. 2 taken along direction G-G;

fig. 4 is a schematic view of the engine block scavenging path structure shown in fig. 1.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

as shown in fig. 1-4, in which: 1. the device comprises an air filter combination, a carburetor combination, a gas inlet pipe combination, a silencer combination, a catalyst combination, 6, a cylinder body, 7, a crankshaft, 8, a cylinder body gas inlet, 9, a target beam current cushion, 10 combustion chambers, 11, a piston combination, 12, a cylinder body gas outlet, 13, a connecting rod, 14, a crankcase chamber, 15, a special-shaped target beam current hole, 16, a round target beam current hole, 17, a crankcase combination, 18, a secondary scavenging passage, 19 and a main scavenging passage.

The device comprises an air inlet channel 20 (an air filter assembly 1, a carburetor assembly 2 and an air inlet pipe 3), an exhaust channel (a cylinder exhaust port 8, a silencer assembly 4 and a catalyst 5), a cylinder 6 (a cylinder air inlet 8, a cylinder exhaust port 12 and a combustion chamber 10), a crankshaft connecting rod assembly (a crankshaft 7 and a connecting rod 13), a target beam current pad 9 (a special-shaped target beam current hole 15 and a circular target beam current hole 16), a piston assembly 11, a crankcase 17 (a crankcase chamber 14), a secondary scavenging channel 18 and a main scavenging channel 19. The lower opening of the cylinder 6 is arranged at the upper opening of the crankcase 17, the inner cavity of the cylinder is communicated with the crankcase chamber 14, and the piston assembly 11 drives the crankshaft 7 arranged in the crankcase chamber 14 to rotate through the connecting rod 13 when the inner cavity of the cylinder does reciprocating motion. The upper edge of the piston forms a combustion chamber 10 with the inner wall of the cylinder 6.

An air filter assembly 1, a carburetor assembly 2 and an air inlet pipe assembly 3 are sequentially mounted on a cylinder 6 to form a mixed gas inlet passage 20.

The muffler assembly 4 and the catalyst 5 are sequentially mounted on the cylinder 6 to form an exhaust passage 21. Discharging the waste gas in the combustion chamber to the outside of the combustion chamber; the special-shaped target beam current holes 15 and the round target beam current holes 16 are symmetrically distributed on two sides of the target beam current pad 9. The targeted beam pad 9 is located between the crankcase assembly 17 and the cylinder block 6.

The position of the special-shaped target beam-forming hole 15 corresponds to the main scavenging passage of the cylinder body 6 to form the main scavenging passage. The position of the circular target beam current hole 16 corresponds to the position of the secondary scavenging air passage 18 of the cylinder body 6 to form a secondary scavenging air passage.

The specific working process comprises the following steps:

when the piston moves upward, the mixture in the cylinder is compressed, and at the same time, the volume of the crank chamber below the piston becomes larger, and negative pressure is formed. When the lower edge of the piston skirt part opens a mixed gas inlet, the mixed gas is sucked into a crankshaft chamber through a mixed gas inlet channel formed by an air filter, a carburetor, an air inlet pipe and a cylinder body, when a piston moves upwards to be close to a top dead center, an electric spark is emitted by a spark plug to ignite the compressed mixed gas, the piston is forced to move downwards by expansion of the combusted high-temperature and high-pressure gas, the mixed gas inlet is closed, the combustible mixed gas sucked into the crankshaft chamber is pre-compressed due to downward movement of the piston, positive pressure is formed in the crankshaft chamber, part of the mixed gas in the crankshaft chamber accurately enters a main scavenging air passage at a high speed through a circular target beam flow hole, the other part of the mixed gas accurately enters a secondary scavenging air passage at a high speed through an abnormal-shaped target beam flow hole, the mixed gas firstly enters the main scavenging air passage and passes through a small circular target beam flow hole, the flow rate of the mixed gas is high, the mixed gas then enters the secondary scavenging air passage and passes through an abnormal-shaped target beam flow hole, the flow rate is lower than that the mixed gas in the main scavenging air passage, but the mixed gas uniformly forms mixed gas with different pressures in the secondary scavenging air passage after passing through the target beam flow hole. When the piston continues to move downwards, the exhaust port is opened, part of exhaust gas flows into the atmosphere through the exhaust port via the silencer, and because the two sides of the target beam flow cushions are respectively provided with the target beam flow holes, and the structures and paths of the target beam flow holes are different, the scavenging gas with different flow rates forms vortex in the combustion chamber, the scavenging efficiency is improved, the emission of compounds such as HC and CO in the tail gas is reduced, and the fuel consumption rate of the machine is correspondingly reduced.

The beneficial effects are that: the main beam flow hole starts scavenging with the auxiliary scavenging passage by means of high-speed airflow with a circular structure, and then mixed gas and oil uniformly distribute through the special-shaped beam flow hole and enter the scavenging passage at different pressures to continue scavenging. The gas generates different flowability in the cylinder body scavenging channel through the main beam flow hole and the special-shaped beam flow hole, and when the gas flows into the combustion chamber, vortex is generated, so that the scavenging efficiency is greatly improved, and the emission of compounds such as HC, CO and the like in tail gas is reduced.

Obviously, the specific implementation of the present invention is not limited by the above specific embodiments, and various insubstantial improvements made by the structural conception and the technical solution of the present invention are all within the protection scope of the present invention.

Claims

1. A targeted beam scavenging combustion technology engine comprises a crankcase, a crankshaft connecting rod group, a cylinder body, a piston and a targeted beam gasket, wherein the cylinder body is provided with an air inlet, a scavenging port and a main scavenging passage and an auxiliary scavenging passage; the method is characterized in that: the target beam current cushion is provided with beam current holes with two different structures, the corresponding position of the main scavenging passage is provided with a circular target beam current hole with the diameter of 5mm, and the corresponding position of the auxiliary scavenging passage is provided with a special-shaped target beam current hole.